From: Nathael Pajani Date: Sun, 3 Jan 2021 19:52:56 +0000 (+0100) Subject: Transparent bridge used for UART to RF868 bridging. X-Git-Url: http://git.techno-innov.fr/?a=commitdiff_plain;h=49a0c61777d71ca10e23d3a042e22ed3a8b9e878;p=soft%2Flpc122x%2Frfsub1GHz Transparent bridge used for UART to RF868 bridging. --- 49a0c61777d71ca10e23d3a042e22ed3a8b9e878 diff --git a/transparent_bridge/Makefile b/transparent_bridge/Makefile new file mode 100644 index 0000000..41ae555 --- /dev/null +++ b/transparent_bridge/Makefile @@ -0,0 +1,21 @@ +# Makefile for apps + +MODULE = $(shell basename $(shell cd .. && pwd && cd -)) +NAME = $(shell basename $(CURDIR)) + +# Add this to your ~/.vimrc in order to get proper function of :make in vim : +# let $COMPILE_FROM_IDE = 1 +ifeq ($(strip $(COMPILE_FROM_IDE)),) + PRINT_DIRECTORY = --no-print-directory +else + PRINT_DIRECTORY = + LANG = C +endif + +.PHONY: $(NAME).bin +$(NAME).bin: + @make -C ../../.. ${PRINT_DIRECTORY} NAME=$(NAME) MODULE=$(MODULE) apps/$(MODULE)/$(NAME)/$@ + +clean mrproper: + @make -C ../../.. ${PRINT_DIRECTORY} $@ + diff --git a/transparent_bridge/README b/transparent_bridge/README new file mode 100644 index 0000000..f956ddf --- /dev/null +++ b/transparent_bridge/README @@ -0,0 +1,28 @@ +Support for the Sub 1GHz module in USB or UEXT version + +Copyright 2013 Nathael Pajani + + +/* **************************************************************************** + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + * + *************************************************************************** */ + +This module uses the CC1101 transceiver to provide Sub 1GHz Rf connectivity. + +The module also integrates a TMP101 temparature sensor, the usual bi-color led +used for status, a RTC quartz, a DC-DC step-up for button battery power source +support, and an extension port with a set of gpio, including ADC (2), PWM (2), +I2C and SWD debug port. + diff --git a/transparent_bridge/main.c b/transparent_bridge/main.c new file mode 100644 index 0000000..7d5feca --- /dev/null +++ b/transparent_bridge/main.c @@ -0,0 +1,267 @@ +/**************************************************************************** + * apps/rf_sub1G/transparent_bridge/main.c + * + * sub1G_module support code - Transparent bridge + * + * Copyright 2021 Nathael Pajani + * + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + * + *************************************************************************** */ + + +#include "core/system.h" +#include "core/systick.h" +#include "core/pio.h" +#include "lib/stdio.h" +#include "drivers/serial.h" +#include "drivers/gpio.h" +#include "drivers/ssp.h" +#include "extdrv/cc1101.h" +#include "extdrv/status_led.h" + + +#define MODULE_VERSION 0x03 +#define MODULE_NAME "RF Sub1G" + +#define DEBUG 1 +#undef DEBUG + +#define BUFF_LEN 60 + +#define SELECTED_FREQ FREQ_SEL_48MHz + +/***************************************************************************** */ +/* Pins configuration */ +/* pins blocks are passed to set_pins() for pins configuration. + * Unused pin blocks can be removed safely with the corresponding set_pins() call + * All pins blocks may be safelly merged in a single block for single set_pins() call.. + */ +const struct pio_config common_pins[] = { + /* UART 0 */ + { LPC_UART0_RX_PIO_0_1, LPC_IO_DIGITAL }, + { LPC_UART0_TX_PIO_0_2, LPC_IO_DIGITAL }, + /* SPI */ + { LPC_SSP0_SCLK_PIO_0_14, LPC_IO_DIGITAL }, + { LPC_SSP0_MOSI_PIO_0_17, LPC_IO_DIGITAL }, + { LPC_SSP0_MISO_PIO_0_16, LPC_IO_DIGITAL }, + /* GPIO */ + { LPC_GPIO_0_15, LPC_IO_DIGITAL }, + { LPC_GPIO_0_6, LPC_IO_DIGITAL }, + { LPC_GPIO_0_7, LPC_IO_DIGITAL }, + ARRAY_LAST_PIO, +}; + +const struct pio cc1101_cs_pin = LPC_GPIO_0_15; +const struct pio cc1101_miso_pin = LPC_SSP0_MISO_PIO_0_16; +const struct pio cc1101_gdo0 = LPC_GPIO_0_6; +const struct pio cc1101_gdo2 = LPC_GPIO_0_7; + +const struct pio status_led_green = LPC_GPIO_0_28; +const struct pio status_led_red = LPC_GPIO_0_29; + + +/***************************************************************************** */ +void system_init() +{ + /* Stop the watchdog */ + startup_watchdog_disable(); /* Do it right now, before it gets a chance to break in */ + system_brown_out_detection_config(0); /* No ADC used */ + system_set_default_power_state(); + clock_config(SELECTED_FREQ); + set_pins(common_pins); + gpio_on(); + /* System tick timer MUST be configured and running in order to use the sleeping + * functions */ + systick_timer_on(1); /* 1ms */ + systick_start(); +} + +/* Define our fault handler. This one is not mandatory, the dummy fault handler + * will be used when it's not overridden here. + * Note : The default one does a simple infinite loop. If the watchdog is deactivated + * the system will hang. + */ +void fault_info(const char* name, uint32_t len) +{ + uprintf(UART0, name); + while (1); +} + + +/******************************************************************************/ +/* RF Communication */ +#define RF_BUFF_LEN 64 + +static volatile int check_rx = 0; +void rf_rx_calback(uint32_t gpio) +{ + check_rx = 1; +} + +static uint8_t rf_specific_settings[] = { + CC1101_REGS(gdo_config[2]), 0x07, /* GDO_0 - Assert on CRC OK | Disable temp sensor */ + CC1101_REGS(gdo_config[0]), 0x2E, /* GDO_2 - FIXME : do something usefull with it for tests */ + CC1101_REGS(pkt_ctrl[0]), 0x0F, /* Accept all sync, CRC err auto flush, Append, Addr check and full bcast */ +}; + +/* RF config */ +void rf_config(void) +{ + config_gpio(&cc1101_gdo0, LPC_IO_MODE_PULL_UP, GPIO_DIR_IN, 0); + cc1101_init(0, &cc1101_cs_pin, &cc1101_miso_pin); /* ssp_num, cs_pin, miso_pin */ + /* Set default config */ + cc1101_config(); + /* And change application specific settings */ + cc1101_update_config(rf_specific_settings, sizeof(rf_specific_settings)); + set_gpio_callback(rf_rx_calback, &cc1101_gdo0, EDGE_RISING); + +#ifdef DEBUG + uprintf(UART0, "CC1101 RF link init done.\n"); +#endif +} + +void handle_rf_rx_data(void) +{ + uint8_t data[RF_BUFF_LEN]; + int8_t ret = 0; + uint8_t status = 0, i = 0; + + /* Check for received packet (and get it if any) */ + ret = cc1101_receive_packet(data, RF_BUFF_LEN, &status); + /* Go back to RX mode */ + cc1101_enter_rx_mode(); + +#ifdef DEBUG + uprintf(UART0, "RF: ret:%d, st: %d.\n", ret, status); +#endif + + if (ret > 0) { +#ifdef DEBUG + uprintf(UART0, "## RF Data :\n"); +#endif + for (i = 0; i < ret; i++) { + uprintf(UART0, "%c", data[i]); + } +#ifdef DEBUG + uprintf(UART0, "\n## RF Data End\n"); +#endif + } +} + + +/* Data sent on radio comes from the UART, put any data received from UART in + * cc_tx_buff and send when either '\r' or '\n' is received. + * This function is very simple and data received between cc_tx flag set and + * cc_ptr rewind to 0 may be lost. */ +static volatile uint8_t cc_tx = 0; +static volatile uint8_t cc_tx_buff[RF_BUFF_LEN]; +void handle_uart_cmd(uint8_t c) +{ + static uint8_t len = 0; + static uint8_t cc_ptr = 0; + + /* Check that this is the beginning of a packet, and that the buffer is available. + * Else, drop data */ + if ((len == 0) && (cc_tx == 0)) { + len = c; + cc_ptr = 0; + } + if ((len != 0) && (cc_ptr < RF_BUFF_LEN)) { + cc_tx_buff[cc_ptr++] = c; + if (cc_ptr > len) { /* Need one more than len for the tx length byte */ + cc_tx = len + 1; + len = 0; + } + } else { + len = 0; + } +} + +void send_on_rf(void) +{ + uint8_t cc_tx_data[RF_BUFF_LEN + 2]; + uint8_t tx_len = cc_tx; + int ret = 0; + + /* Create a local copy */ + memcpy((char*)&(cc_tx_data), (char*)cc_tx_buff, tx_len); + /* "Free" the buffer as soon as possible */ + cc_tx = 0; +#ifdef DEBUG_BROADCAST + cc_tx_data[1] = 0; /* Broadcast */ +#endif + /* Send */ + if (cc1101_tx_fifo_state() != 0) { + cc1101_flush_tx_fifo(); + } + ret = cc1101_send_packet(cc_tx_data, tx_len); + +#ifdef DEBUG + uprintf(UART0, "Tx ret: %d\n", ret); +#endif +} + + +/***************************************************************************** */ +int main(void) +{ + system_init(); + uart_on(UART0, 115200, handle_uart_cmd); + ssp_master_on(0, LPC_SSP_FRAME_SPI, 8, 4*1000*1000); /* bus_num, frame_type, data_width, rate */ + status_led_config(&status_led_green, &status_led_red); + + /* Radio */ + rf_config(); + + while (1) { + uint8_t status = 0; + /* Tell we are alive :) */ + chenillard(250); + + /* RF */ + if (cc_tx != 0) { + send_on_rf(); + } + /* Do not leave radio in an unknown or unwated state */ + do { + status = (cc1101_read_status() & CC1101_STATE_MASK); + } while (status == CC1101_STATE_TX); + + if (status != CC1101_STATE_RX) { + static uint8_t loop = 0; + loop++; + if (loop > 10) { + if (cc1101_rx_fifo_state() != 0) { + cc1101_flush_rx_fifo(); + } +#ifdef DEBUG + uprintf(UART0, "Back to Rx\n"); +#endif + cc1101_enter_rx_mode(); + loop = 0; + } + } + if (check_rx == 1) { + check_rx = 0; + handle_rf_rx_data(); + } + } + return 0; +} + + + +